<form action="GraphServlet" method="post"  >
	<script>
		$(function() {
			$( "#datepicker" ).datepicker();
		});
	</script>
	<script>
		$(function() {
			$( "#datepicker2" ).datepicker();
		});
	</script>
<% if(session.getAttribute("van") == null){
	session.setAttribute("van", "");
} if(session.getAttribute("tot") == null){
	session.setAttribute("tot", "");
} %>
	<div class="demo">
		<table>
			<tr>
			
				<td>Datum van: <input id="datepicker" name="van" value="<%= session.getAttribute("van") %>" type="text"></td>
				<td><p>Tot: <input id="datepicker2" name="tot" value="<%= session.getAttribute("tot") %>" type="text"></p></td>
				<td><input type="submit" id="button" value="verander" /></td>
			</tr>	
		</table>	
	</div>	
</form>